package com.copro.simple;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

/**
 * Filter implementation class for Filter: EncodingFilter
 *
 */
public class EncodingFilter implements Filter {
	
	private String encoding = "UTF-8";

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		request.setCharacterEncoding(encoding); 
		response.setCharacterEncoding(encoding); 
		chain.doFilter(request,response); 
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		String end = fConfig.getInitParameter("encoding");
		if(null != end && !"".equals(end)){
			encoding = end;
		}
	}

}
